EVAPORATION AND SEDIMENTATION Science Project.pdf

EVAPORATION AND SEDIMENTATION Science Project

1. EURO SCHOOL, THANE
SCIENCEPROJECT
ANUSHKASAKPAL
EUROSCHOOL
Grade4/I
1

2. TOPIC:
METHODS OF
SEPARATION2

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METHODS OF SEPARATION
MANY MIXTURES USED IN DAILY LIFE HAVE
DIFFERENT TYPES OF SOLUBLE AND INSOLUBLE
IMPURITIES N THEM. THESE IMPURITIES CAN CAUSE
HARM, IF THEY ARE NOT SEPARATED BEFORE USE .
DIFFERENT METHOS OF SEPARATION
EVAPORATION
SEDIMENTATION
DECANTATION
FILTRATION

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EVAPORATION
EVAPORATION IS A TECHNIQUE THAT IS USED IN
SEPARATING A MIXTURE, USUALLY A SOLUTION AND A
SOLUBLE SOLID.
IN THIS METHOD, THE SOLUTION IS HEATED UNTIL
THE IT EVAPORATES WHERE IT TURNS INTO A GAS
AND MOSTLY LEAVES BEHIND THE SOLID RESIDUE.

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EVAPORATION EXAMPLE
WHEN SEAWATER IS ALLOWED TO STAND IN SHALLOW PITS,
WATER GETS HEATED BY SUNLIGHT AND SLOWLY TURNS INTO
WATER VAPOUR, THROUGH EVAPORATION .
IN A FEW DAYS, THE WATER EVAPORATES COMPLETELY
LEAVING BEHIND THE SOLID SALTS.

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SEDIMENTATION
SEDIMENTATIONIS A PROCESS OF SETTLING DOWN OF
THE HEAVIER PARTICLES PRESENT IN A LIQUID
MIXTURE.
FOR EXAMPLE, IN A MIXTURE OF SAND AND WATER,
SAND SETTLES DOWN AT THE BOTTOM. THIS IS
SEDIMENTATION.

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DECANTATION
DECANTATION IS THE PROCESS OF SEPARATION OF LIQUID FROM
SOLID AND OTHER NON-MIXING LIQUIDS, BY REMOVING THE LIQUID
LAYER AT THE TOP FROM THE LAYER OF SOLID OR LIQUID BELOW .
THE PROCESS CAN BE CARRIED OUT BY TILTING THE MIXTURE
AFTER POURING OUT THE TOP LAYER.

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FILTRATION
IT IS THE PROCESS IN WHICH SOLID PARTICLES IN A LIQUID OR
GASEOUS FLUID ARE REMOVED BY THE USE OF A FILTER MEDIUM
THAT PERMITS THE FLUID TO PASS THROUGH BUT RETAINS THE
SOLID PARTICLES.

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FILTRATION EXAMPLE
THEMOST COMMON EXAMPLE IS MAKING TEA. WHILE PREPARING
TEA, A FILTER OR A SIEVE IS USED TO SEPARATE TEA LEAVES FROM
THE WATER.

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